<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
</head>
<body>
    <button id="btn">按钮</button>
    <div id="app"></div>
    <script type="text/babel">
        const oBtn = document.getElementById("btn");
        const userData = ["HTML", "CSS", "JavaScript", "NodeJS"];
        const vDOM = (
            <ul>
                {
                    userData.map((item)=>{
                        return <li>{item}</li>;
                    })
                }    
            </ul>
        );
        const root = ReactDOM.createRoot(document.getElementById("app"));
        root.render(vDOM);
        oBtn.onclick = function(){
            userData.push("React");
            const vDOM =(
                <ul>
                    {userData.map(item=>{
                        return <li>{item}</li>
                    })}    
                </ul>
            );
            root.render(vDOM);
        }
    </script>
</body>
</html>